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Suitable for controlling exothermic and endothermic reactions, Advanced Programmable and Performance Programmable Refrigerating/Heating Circulators from PolyScience feature operating temperature ranges as broad as -40° to 200°C, temperature stabilities as precise as ±0.005°C, and are available in reservoir sizes from 7 to 45 liters. Typical applications include the control of jacketed reactor vessels and reaction blocks as well as polymerization, polycondensation and distillation. The circulators’ variable-speed pressure/suction pump is capable of delivering pressure flow rates as high as 20.1 LPM. The Advanced Programmable models have a programmable controller capable of storing ten 100-step time/temperature programs, while Performance Programmable models have no restriction on the number of programs or program steps that can be stored. They are able to control temperature right at the point of application, which eliminates temperature shifts due to heat loss along tubing lines. Other standard features include RS232/RS485 and Ethernet communications capability, multi-language help menus, and a 4.3” SmartTouch display.